Theora to QT (MOV) - Online Video Converter
Convert Theora to QT (MOV) online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
About Theora to QT (MOV)
Convert Theora to QT (MOV). Theora is Xiph's open video codec paired with Vorbis audio. QT (MOV) is the legacy QuickTime alias kept for older editing projects. Legacy codecs inside may need transcoding before playback..
Why convert Theora to QT (MOV)?
- Smaller files with QT (MOV) lossy compression.
- Keep animation and transparency where supported.
- Private, no upload - runs in your browser.
Theora vs QT (MOV)
| Animation | Yes | Yes |
|---|---|---|
| Transparency | No | Yes |
| Compression | lossy | lossy |
| Typical use | Theora is Xiph's open video codec paired with Vorbis audio. | QT (MOV) is the legacy QuickTime alias kept for older editing projects. |
When not to convert Theora to QT (MOV)
- Skip QT (MOV) for archival masters: lossy compression discards detail, so keep the Theora original.
- Keep a master copy: repeated exports stack small losses, so archive Theora before batch QT (MOV) shares.
Limits
Starting point: Theora - Theora is Xiph's open video codec paired with Vorbis audio. Ogg multiplexing quirks can offset sync; verify after conversion. Legacy codecs inside may need transcoding before playback. Encode QT (MOV) (H.264 / AAC) from Theora at a bitrate near the source, and confirm the audio track before converting.
How conversion works
Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.